Fastener



FIG. 1 is a top perspective view of a fastener in accordance with thepresent design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a front side elevation view thereof;

FIG. 6 is a rear side elevation view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a cross-sectional view thereof along line 8-8 of FIG. 2.

The broken lines show portions of the design that form no part of theclaimed design.

CLAIM The ornamental design for a fastener, as shown and described.